anyone have experience with Non-Violent communication (nvc)?

Hello,
New here. someone on another forum where I had asked the same question suggested this forum.

my friend has been is NVC for years - off and on .
recently she has been very involved.
I don't think this is a cult in the sense that they kidnap people, or demand large sums of money.
But they have a philosophical/psychological approach which seems cult-like to me.

So I'd like to know if anyone else thinks so.

They have their own language. Their own way of speaking. so when my friend talks to me, instead of the natural conversation we used to have, her side of the conversation is stilted, contrived, inauthentic, scripted.
And she got absolutely furious with me when I told her I do not want to engage in this manner of "communication" with her.

nvc is supposed to encourage empathy, but to me it does just the opposite.

I'm really not sure if it is that my friend is taking some good principles and inexpertly applying them, or if the goal of the nvc is to separate practitioners from "non-NVC" people. Because if that is the goal, it is working.

Thank you in advance for any comments or feed-back.